DUO studied the concept and created a compact design with specially tuned propellers that incorporated more subtle actions then conceived by other manufactures. Its compact yet heavy body harbors a fixed ballast system made to increase trajectory and improve target orientation and provide a heavy roll action. This combination emulates the shimmer-effect of baitfish. The Duo Realis Spin Bait 80 also possesses specially designed cupped propellers, which provide more pulsation at slower revolutions.

The technique called Spybaitn is considered an ultra-finesse hard bait technique requiring light line, long casts and in-line retrieves. Manipulation of the technique requires concentration and steady slow retrieves.

But the results are mind altering. It is a finesse technique that catches big fish as well as numbers. It has recently, hit the US shores and quietly professional Tour anglers are using the technique with great success.